How are you?
Going by the case history, I think that perhaps pleural cancer has resulted as a result of metastasis from the bladder cancer or from colon cancer. Metastasis means the spread of cancer. Cancer cells can break away from a primary tumor and enter the bloodstream or lymphatic system. That is how cancer cells spread to other parts of the body.
Metastatic cancers may be found before or at the same time as the primary tumor, or months or years later. When a new tumor is found in a patient who has been treated for cancer in the past, it is more often a metastasis than another primary tumor
When cancer has metastasized, it may be treated with chemotherapy, radiation therapy, biological therapy, hormone therapy, surgery, cryosurgery, or a combination of these. The choice of treatment generally depends on the type of primary cancer, the size and location of the metastasis, the patient’s age and general health, and the types of treatments the patient has had in the past. The goal of treatment may be to control the cancer, or to relieve symptoms or side effects of treatment.
Pleural cancer is very difficult to diagnose. The disease is most often in an advanced stage when discovered. That makes treatment options limited. Chemotherapy and radiation therapy are the two means of treatment for pleural cancer. Such treatment is often palliative - meant to relieve the symptoms of the disease, make the patient more comfortable, and improve the patient's quality of life during the months ahead.
Surgery is an option later because the tumors are often large and widespread by the time of diagnosis.
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Take care and God bless.
Are you sure it is pleural cancer? Mesothelioma? This is a fairly uncommon case and such cases are generally primaries not metastatic disease from the colon or the bladder. If there was mention of it being early disease, was there a mention whether or not it can be removed with surgery? why is chemotherapy being suggested (this is usually the case for patients who have advanced disease)?
I’m sorry if I seem to add more questions than answers, but I think you need to have a thorough discussion with your doctors as to the direction of treatment, what the specific goals are.